/* io.c
 *
 * Miscellaneous functions used by the example programs.
 */

/* nettle, low-level cryptographics library
 *
 * Copyright (C) 2002 Niels M�ller
 *  
 * The nettle library is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation; either version 2.1 of the License, or (at your
 * option) any later version.
 * 
 * The nettle library is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
 * License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public License
 * along with the nettle library; see the file COPYING.LIB.  If not, write to
 * the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
 * MA 02111-1307, USA.
 */

#ifndef NETTLE_EXAMPLES_IO_H_INCLUDED
#define NETTLE_EXAMPLES_IO_H_INCLUDED

#include "nettle-meta.h"
#include "rsa.h"
#include "yarrow.h"

#include <stdio.h>

extern int quiet_flag;

void *
xalloc(size_t size);

void
werror(const char *format, ...)
#if __GNUC___
     __attribute__((__format__ (__printf__,1, 2)))
#endif
     ;

/* If size is > 0, read at most that many bytes. If size == 0,
 * read until EOF. Allocates the buffer dynamically. */
unsigned
read_file(const char *name, unsigned size, char **buffer);

int
write_file(const char *name, unsigned size, const char *buffer);

int
write_string(FILE *f, unsigned size, const char *buffer);

int
simple_random(struct yarrow256_ctx *ctx, const char *name);

int
hash_file(const struct nettle_hash *hash, void *ctx, FILE *f);

struct rsa_public_key;
struct rsa_private_key;

int
read_rsa_key(const char *name,
	     struct rsa_public_key *pub,
	     struct rsa_private_key *priv);

#endif /* NETTLE_EXAMPLES_IO_H_INCLUDED */